I recently installed Ubuntu focal. I understand that the current kernel witch comes with it contains the open source drivers, radeon and amdgpu. Although for some people it work out of the box for me that is not the case.
VGA : ASUS R9 390 OC 8GB
Monitor: Benq xl2411 1080p 144 hz
Monitor: Generic 1080p 60hz
In detail immediately after installation i had about 5 min before screen turns black. In the meanwhile i got intense screen tearing. Thinks got even worse when i added a 2nd monitor.
I tried to find a workaround and i managed to get it at least to stay on even with 144hz refresh rate using it alone or both of the monitors with 60hz using these kernel parameters in grub config.
radeon.cik_support=0 radeon.si_support=0 amdgpu.cik_support=1 amdgpu.si_support=1 amdgpu.dpm=1 amdgpu.dc=1
but I cannot use the 1st monitor with 144hz and the 2nd one with 60hz. When i try to set the hertz higher on the first monitor thee second one blacks out.
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
DistUpgraded: Fresh install
DistroCodename: focal
DistroRelease: Ubuntu 20.04
DistroVariant: ubuntu
GraphicsCard:
Advanced Micro Devices, Inc. [AMD/ATI] Hawaii PRO [Radeon R9 290/390] [1002:67b1] (rev 80) (prog-if 00 [VGA controller])
Subsystem: ASUSTeK Computer Inc. Hawaii PRO [Radeon R9 290/390] [1043:04ed]
InstallationDate: Installed on 2020-05-14 (3 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: To be filled by O.E.M. To be filled by O.E.M.
Package: xserver-xorg-video-amdgpu 19.1.0-1
PackageArchitecture: amd64
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-29-generic root=UUID=a362c5d3-fee4-4294-b8a4-8f0a69213fb9 ro quiet radeon.cik_support=0 radeon.si_support=0 amdgpu.cik_support=1 amdgpu.si_support=1 amdgpu.dpm=1 amdgpu.dc=1
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Tags: focal ubuntu
Uname: Linux 5.4.0-29-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 04/07/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 2501
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: M5A99FX PRO R2.0
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2501:bd04/07/2014:svnTobefilledbyO.E.M.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnASUSTeKCOMPUTERINC.:rnM5A99FXPROR2.0:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: To be filled by O.E.M.
dmi.product.sku: SKU
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: To be filled by O.E.M.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1
Thank you to report this bug and make ubuntu better!
Please if you file a bug, use ubuntu-bug yourpackage from terminal
so useful info pulls into the bug and the developers can debug
your issue a better way.
You can still apport-collect 1878618 in this stage to pull
your info into this existing bug.
Maybe also attach your dmesg log and a screenshot of the tearing.
Thank you!